src/Tools/jEdit/src/proofdocument/session.scala
author wenzelm
Fri Jan 01 21:45:26 2010 +0100 (2010-01-01)
changeset 34826 6b38fc0b3406
parent 34825 7f72547f9b12
child 34831 4ad3298781d9
permissions -rw-r--r--
eliminated redundant session documents database;
tuned;
wenzelm@34777
     1
/*
wenzelm@34777
     2
 * Isabelle session, potentially with running prover
wenzelm@34777
     3
 *
wenzelm@34777
     4
 * @author Makarius
wenzelm@34777
     5
 */
wenzelm@34777
     6
wenzelm@34777
     7
package isabelle.proofdocument
wenzelm@34777
     8
wenzelm@34777
     9
wenzelm@34820
    10
import scala.actors.TIMEOUT
wenzelm@34777
    11
import scala.actors.Actor._
wenzelm@34777
    12
wenzelm@34815
    13
wenzelm@34791
    14
object Session
wenzelm@34791
    15
{
wenzelm@34813
    16
  /* events */
wenzelm@34813
    17
wenzelm@34791
    18
  case object Global_Settings
wenzelm@34813
    19
wenzelm@34813
    20
wenzelm@34813
    21
  /* managed entities */
wenzelm@34813
    22
wenzelm@34813
    23
  type Entity_ID = String
wenzelm@34813
    24
wenzelm@34813
    25
  trait Entity
wenzelm@34813
    26
  {
wenzelm@34813
    27
    val id: Entity_ID
wenzelm@34813
    28
    def consume(session: Session, message: XML.Tree): Unit
wenzelm@34813
    29
  }
wenzelm@34791
    30
}
wenzelm@34791
    31
wenzelm@34777
    32
wenzelm@34777
    33
class Session(system: Isabelle_System)
wenzelm@34777
    34
{
wenzelm@34809
    35
  /* pervasive event buses */
wenzelm@34809
    36
wenzelm@34809
    37
  val global_settings = new Event_Bus[Session.Global_Settings.type]
wenzelm@34809
    38
  val raw_results = new Event_Bus[Isabelle_Process.Result]
wenzelm@34809
    39
  val results = new Event_Bus[Command]
wenzelm@34809
    40
wenzelm@34809
    41
  val command_change = new Event_Bus[Command]
wenzelm@34823
    42
  val document_change = new Event_Bus[Document]
wenzelm@34809
    43
wenzelm@34809
    44
wenzelm@34778
    45
  /* unique ids */
wenzelm@34778
    46
wenzelm@34778
    47
  private var id_count: BigInt = 0
wenzelm@34813
    48
  def create_id(): Session.Entity_ID = synchronized { id_count += 1; "j" + id_count }
wenzelm@34778
    49
wenzelm@34778
    50
wenzelm@34826
    51
wenzelm@34826
    52
  /** main actor **/
wenzelm@34809
    53
wenzelm@34819
    54
  @volatile private var syntax = new Outer_Syntax(system.symbols)
wenzelm@34819
    55
  def current_syntax: Outer_Syntax = syntax
wenzelm@34809
    56
wenzelm@34816
    57
  @volatile private var entities = Map[Session.Entity_ID, Session.Entity]()
wenzelm@34816
    58
  def lookup_entity(id: Session.Entity_ID): Option[Session.Entity] = entities.get(id)
wenzelm@34816
    59
wenzelm@34816
    60
  private case class Register(entity: Session.Entity)
wenzelm@34820
    61
  private case class Start(timeout: Int, args: List[String])
wenzelm@34777
    62
  private case object Stop
wenzelm@34808
    63
  private case class Begin_Document(path: String)
wenzelm@34777
    64
wenzelm@34809
    65
  private val session_actor = actor {
wenzelm@34809
    66
wenzelm@34809
    67
    var prover: Isabelle_Process with Isar_Document = null
wenzelm@34809
    68
wenzelm@34816
    69
    def register(entity: Session.Entity) { entities += (entity.id -> entity) }
wenzelm@34816
    70
wenzelm@34809
    71
wenzelm@34809
    72
    /* document changes */
wenzelm@34809
    73
wenzelm@34809
    74
    def handle_change(change: Change)
wenzelm@34809
    75
    {
wenzelm@34824
    76
      require(change.parent.isDefined)
wenzelm@34809
    77
wenzelm@34825
    78
      val (doc, changes) = change.result.join
wenzelm@34809
    79
      val id_changes = changes map {
wenzelm@34809
    80
        case (c1, c2) =>
wenzelm@34809
    81
          (c1.map(_.id).getOrElse(""),
wenzelm@34809
    82
           c2 match {
wenzelm@34809
    83
              case None => None
wenzelm@34809
    84
              case Some(command) =>  // FIXME clarify -- may reuse existing commands!??
wenzelm@34816
    85
                register(command)
wenzelm@34809
    86
                prover.define_command(command.id, system.symbols.encode(command.content))
wenzelm@34809
    87
                Some(command.id)
wenzelm@34809
    88
            })
wenzelm@34809
    89
      }
wenzelm@34818
    90
      register(doc)
wenzelm@34824
    91
      prover.edit_document(change.parent.get.document.id, doc.id, id_changes)
wenzelm@34809
    92
wenzelm@34809
    93
      document_change.event(doc)
wenzelm@34809
    94
    }
wenzelm@34809
    95
wenzelm@34809
    96
wenzelm@34809
    97
    /* prover results */
wenzelm@34809
    98
wenzelm@34809
    99
    def handle_result(result: Isabelle_Process.Result)
wenzelm@34809
   100
    {
wenzelm@34809
   101
      raw_results.event(result)
wenzelm@34799
   102
wenzelm@34813
   103
      val target: Option[Session.Entity] =
wenzelm@34817
   104
        Position.get_id(result.props) match {
wenzelm@34809
   105
          case None => None
wenzelm@34816
   106
          case Some(id) => entities.get(id)
wenzelm@34809
   107
        }
wenzelm@34813
   108
      if (target.isDefined) target.get.consume(this, result.message)
wenzelm@34809
   109
      else if (result.kind == Isabelle_Process.Kind.STATUS) {
wenzelm@34818
   110
        // global status message
wenzelm@34809
   111
        for (elem <- result.body) {
wenzelm@34809
   112
          elem match {
wenzelm@34809
   113
            // command and keyword declarations
wenzelm@34809
   114
            case XML.Elem(Markup.COMMAND_DECL, (Markup.NAME, name) :: (Markup.KIND, kind) :: _, _) =>
wenzelm@34819
   115
              syntax += (name, kind)
wenzelm@34809
   116
            case XML.Elem(Markup.KEYWORD_DECL, (Markup.NAME, name) :: _, _) =>
wenzelm@34819
   117
              syntax += name
wenzelm@34809
   118
wenzelm@34820
   119
            case _ =>
wenzelm@34809
   120
          }
wenzelm@34809
   121
        }
wenzelm@34809
   122
      }
wenzelm@34809
   123
      else if (result.kind == Isabelle_Process.Kind.EXIT)
wenzelm@34809
   124
        prover = null
wenzelm@34809
   125
    }
wenzelm@34809
   126
wenzelm@34820
   127
wenzelm@34820
   128
    /* prover startup */
wenzelm@34820
   129
wenzelm@34820
   130
    def startup_error(): String =
wenzelm@34820
   131
    {
wenzelm@34820
   132
      val buf = new StringBuilder
wenzelm@34820
   133
      while (
wenzelm@34820
   134
        receiveWithin(0) {
wenzelm@34820
   135
          case result: Isabelle_Process.Result =>
wenzelm@34820
   136
            if (result.is_raw) {
wenzelm@34820
   137
              for (text <- XML.content(result.message))
wenzelm@34820
   138
                buf.append(text)
wenzelm@34820
   139
            }
wenzelm@34820
   140
            true
wenzelm@34820
   141
          case TIMEOUT => false
wenzelm@34820
   142
        }) {}
wenzelm@34820
   143
      buf.toString
wenzelm@34820
   144
    }
wenzelm@34820
   145
wenzelm@34820
   146
    def prover_startup(timeout: Int): Option[String] =
wenzelm@34820
   147
    {
wenzelm@34820
   148
      receiveWithin(timeout) {
wenzelm@34820
   149
        case result: Isabelle_Process.Result
wenzelm@34820
   150
          if result.kind == Isabelle_Process.Kind.INIT =>
wenzelm@34820
   151
          while (receive {
wenzelm@34820
   152
            case result: Isabelle_Process.Result =>
wenzelm@34820
   153
              handle_result(result); !result.is_ready
wenzelm@34820
   154
            }) {}
wenzelm@34820
   155
          None
wenzelm@34820
   156
wenzelm@34820
   157
        case result: Isabelle_Process.Result
wenzelm@34820
   158
          if result.kind == Isabelle_Process.Kind.EXIT =>
wenzelm@34820
   159
          Some(startup_error())
wenzelm@34820
   160
wenzelm@34820
   161
        case TIMEOUT =>  // FIXME clarify
wenzelm@34820
   162
          prover.kill; Some(startup_error())
wenzelm@34820
   163
      }
wenzelm@34820
   164
    }
wenzelm@34809
   165
wenzelm@34809
   166
wenzelm@34809
   167
    /* main loop */
wenzelm@34809
   168
wenzelm@34820
   169
    val xml_cache = new XML.Cache(131071)
wenzelm@34820
   170
wenzelm@34777
   171
    loop {
wenzelm@34777
   172
      react {
wenzelm@34816
   173
        case Register(entity: Session.Entity) =>
wenzelm@34816
   174
          register(entity)
wenzelm@34816
   175
          reply(())
wenzelm@34816
   176
wenzelm@34820
   177
        case Start(timeout, args) =>
wenzelm@34777
   178
          if (prover == null) {
wenzelm@34780
   179
            prover = new Isabelle_Process(system, self, args:_*) with Isar_Document
wenzelm@34820
   180
            val origin = sender
wenzelm@34820
   181
            val opt_err = prover_startup(timeout)
wenzelm@34820
   182
            if (opt_err.isDefined) prover = null
wenzelm@34820
   183
            origin ! opt_err
wenzelm@34820
   184
          }
wenzelm@34820
   185
          else reply(None)
wenzelm@34820
   186
wenzelm@34820
   187
        case Stop =>  // FIXME clarify; synchronous
wenzelm@34820
   188
          if (prover != null) {
wenzelm@34820
   189
            prover.kill
wenzelm@34820
   190
            prover = null
wenzelm@34777
   191
          }
wenzelm@34777
   192
wenzelm@34820
   193
        case Begin_Document(path: String) if prover != null =>
wenzelm@34808
   194
          val id = create_id()
wenzelm@34823
   195
          val doc = Document.empty(id)
wenzelm@34818
   196
          register(doc)
wenzelm@34808
   197
          prover.begin_document(id, path)
wenzelm@34808
   198
          reply(doc)
wenzelm@34809
   199
wenzelm@34820
   200
        case change: Change if prover != null =>
wenzelm@34777
   201
          handle_change(change)
wenzelm@34777
   202
wenzelm@34777
   203
        case result: Isabelle_Process.Result =>
wenzelm@34795
   204
          handle_result(result.cache(xml_cache))
wenzelm@34777
   205
wenzelm@34820
   206
        case bad if prover != null =>
wenzelm@34777
   207
          System.err.println("session_actor: ignoring bad message " + bad)
wenzelm@34777
   208
      }
wenzelm@34777
   209
    }
wenzelm@34777
   210
  }
wenzelm@34777
   211
wenzelm@34809
   212
wenzelm@34809
   213
  /* main methods */
wenzelm@34809
   214
wenzelm@34816
   215
  def register_entity(entity: Session.Entity) { session_actor !? Register(entity) }
wenzelm@34816
   216
wenzelm@34820
   217
  def start(timeout: Int, args: List[String]): Option[String] =
wenzelm@34820
   218
    (session_actor !? Start(timeout, args)).asInstanceOf[Option[String]]
wenzelm@34820
   219
wenzelm@34777
   220
  def stop() { session_actor ! Stop }
wenzelm@34777
   221
  def input(change: Change) { session_actor ! change }
wenzelm@34777
   222
wenzelm@34823
   223
  def begin_document(path: String): Document =
wenzelm@34823
   224
    (session_actor !? Begin_Document(path)).asInstanceOf[Document]
wenzelm@34777
   225
}